The _______ of a sound wave is defined as the amount of energy passing through a unit area of the wave front in a unit of time.
A. amplitude
B. intensity
C. compression
D. frequency
The correct answer is sound intensity(option b) . Sound intensity is the sound energy - energy in form of vibration - that passes through certain unit area. It is measured in watt per square meter (W/m²) - this is the unit used for its calculation.
